|Publication number||US7219728 B2|
|Application number||US 10/711,866|
|Publication date||May 22, 2007|
|Filing date||Oct 11, 2004|
|Priority date||Oct 11, 2004|
|Also published as||US20060076146|
|Publication number||10711866, 711866, US 7219728 B2, US 7219728B2, US-B2-7219728, US7219728 B2, US7219728B2|
|Inventors||Anthony F. Veneruso, Thomas D. MacDougall|
|Original Assignee||Schlumberger Technology Corporation|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (13), Referenced by (3), Classifications (8), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention generally relates to generating downhole power.
A typical subterranean well includes various devices that are operated by mechanical motion, hydraulic power or electrical power. For devices that are operated by electrical or hydraulic power, control lines and/or electrical cables typically extend downhole for purposes of communicating power to these tools from a power source that is located at the surface. A potential challenge with this arrangement is that the space (inside the wellbore) that is available for routing various downhole cables and hydraulic control lines may be limited. Furthermore, the more hydraulic control lines and electrical cables that must be installed and routed downhole, the higher probability that some part of the power delivery infrastructure may fail.
Thus, some subterranean wells have tools that are powered by downhole power sources. For example, a fuel cell is one such downhole power source that may be used to generate electricity downhole. The subterranean well may include other types of downhole power sources, such as batteries, for example.
A typical subterranean well undergoes a significant amount of vibration (i.e., vibration on the order of Gs, for example) during the production of well fluid. In the past, the energy produced by this vibration has not been captured. However, an emerging trend in subterranean wells is the inclusion of devices to capture this vibrational energy for purposes of converting the energy into a suitable form for downhole power.
Thus, there is a continuing need for better ways to generate power downhole in a subterranean well.
In an embodiment of the invention, a system that is usable with a subterranean well includes a first tubular member that is adapted to receive a flow of a first fluid. The system includes a second tubular member that is located in the flow and is substantially flexible to be moved by the flow to establish a pressure on a second fluid located inside the tubular member. A mechanism of the system uses this pressure to actuate a downhole tool.
Advantages and other features of the invention will become apparent from the following description, drawing and claims.
The tubular string 14, in some embodiments of the invention, is a production tubing string that includes a central passageway 29 that receives the flow of production fluid from the well. For example, as depicted in
More specifically, the fluid flows from the zone 32 up through the central passageway 29 and returns to the surface of the well. Although
In some embodiments of the invention, the tubular string 14 includes a pump 16 that harnesses energy that is generated or induced by the flow of production fluid through the tubular string 14. More specifically, in some embodiments of the invention, the pump 16 is a “lymphatic pump,” in that the pump 16 directly converts energy induced by the flow or well fluid into hydraulic power that may be used to control one or more downhole tools of the string 14.
More specifically, in some embodiments of the invention, the pump 16 exerts hydraulic pressure on fluid that is stored in an accumulator 20 of a hydraulic system 18 of the string 14. The pressure accumulated in the accumulator 20, in turn, is used by the system 18 to drive, or actuate, one or more downhole tools 24 (one tool 24 being depicted in
In some embodiments of the invention, the pump 16 may have a form that is generally depicted in
More specifically, in some embodiments of the invention, the flow tube 50 moves due to the flow 27, as depicted in
Thus, referring to
While the present invention has been described with respect to a limited number of embodiments, those skilled in the art, having the benefit of this disclosure, will appreciate numerous modifications and variations therefrom. It is intended that the appended claims cover all such modifications and variations as fall within the true spirit and scope of this present invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1334632 *||Jun 15, 1917||Mar 23, 1920||Pickin Rowland O||Rotary rock-drill bit|
|US3048230 *||May 25, 1959||Aug 7, 1962||Phillips Petroleum Co||Lubricator for rock bit|
|US3970877||Aug 30, 1974||Jul 20, 1976||Michael King Russell||Power generation in underground drilling operations|
|US4518888||Dec 27, 1982||May 21, 1985||Nl Industries, Inc.||Downhole apparatus for absorbing vibratory energy to generate electrical power|
|US5323855||Feb 17, 1993||Jun 28, 1994||Evans James O||Well stimulation process and apparatus|
|US5839508||Jun 19, 1996||Nov 24, 1998||Baker Hughes Incorporated||Downhole apparatus for generating electrical power in a well|
|US5965964||Sep 16, 1997||Oct 12, 1999||Halliburton Energy Services, Inc.||Method and apparatus for a downhole current generator|
|US6011346||Jul 10, 1998||Jan 4, 2000||Halliburton Energy Services, Inc.||Apparatus and method for generating electricity from energy in a flowing stream of fluid|
|US6504258||Jun 8, 2001||Jan 7, 2003||Halliburton Energy Services, Inc.||Vibration based downhole power generator|
|US6554074||Mar 5, 2001||Apr 29, 2003||Halliburton Energy Services, Inc.||Lift fluid driven downhole electrical generator and method for use of the same|
|US6691802||Oct 26, 2001||Feb 17, 2004||Halliburton Energy Services, Inc.||Internal power source for downhole detection system|
|US6768214||Jul 24, 2001||Jul 27, 2004||Halliburton Energy Services, Inc.||Vibration based power generator|
|WO2001039284A1||Nov 17, 2000||May 31, 2001||Halliburton Energy Serv Inc||Piezoelectric downhole strain sensor and power generator|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7665527||Aug 21, 2007||Feb 23, 2010||Schlumberger Technology Corporation||Providing a rechargeable hydraulic accumulator in a wellbore|
|US20090050373 *||Aug 21, 2007||Feb 26, 2009||Schlumberger Technology Corporation||Providing a rechargeable hydraulic accumulator in a wellbore|
|US20100078216 *||Apr 1, 2010||Baker Hughes Incorporated||Downhole vibration monitoring for reaming tools|
|U.S. Classification||166/244.1, 166/243, 166/65.1|
|Cooperative Classification||E21B41/00, E21B34/08|
|European Classification||E21B41/00, E21B34/08|
|Oct 12, 2004||AS||Assignment|
Owner name: SCHLUMBERGER TECHNOLOGY CORPORATION, TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VENERUSO, ANTHONY F.;MACDOUGALL, THOMAS D.;REEL/FRAME:015241/0435;SIGNING DATES FROM 20041001 TO 20041006
|Oct 20, 2010||FPAY||Fee payment|
Year of fee payment: 4
|Jan 2, 2015||REMI||Maintenance fee reminder mailed|
|May 22, 2015||LAPS||Lapse for failure to pay maintenance fees|
|Jul 14, 2015||FP||Expired due to failure to pay maintenance fee|
Effective date: 20150522